//! `issue-create --title <t> [body sources] [--assignee <u>]
//! [--label <name>]... [repo]` — create an issue. Prints the issue URL.

use anyhow::Result;
use clap::Args as ClapArgs;
use forgejo_api::structs::CreateIssueOption;

use crate::body;
use crate::client::Client;
use crate::verbs::labels;

#[derive(ClapArgs)]
pub struct Args {
    /// Issue title (required).
    #[arg(long)]
    title: String,
    /// Inline body text.
    #[arg(long, conflicts_with = "body_file")]
    body: Option<String>,
    /// Read body from a file. `-` means stdin.
    #[arg(long = "body-file")]
    body_file: Option<String>,
    /// Initial assignee login.
    #[arg(long)]
    assignee: Option<String>,
    /// Label name to attach, repeatable (e.g. `--label area/ops --label
    /// type/bug`). Same spelling `labels add` accepts. An unresolved name
    /// errors out (before the issue is created) rather than silently
    /// attaching fewer labels than asked for.
    #[arg(long = "label")]
    labels: Vec<String>,
}

/// # Errors
///
/// Propagates any I/O error from the body input (`--body-file`,
/// stdin), an absent or whitespace-only body (an issue's body *is*
/// the issue per this repo's contribution guidance — an empty one is
/// never intentional, only ever the signature of a mistake upstream,
/// e.g. a heredoc that bound to the wrong command in a pipeline), any
/// transport error from the Forgejo REST call (network unreachable,
/// 4xx/5xx response, token missing/invalid, the `--label` lookup's
/// own list-labels call), an unresolved `--label` name, and any I/O
/// error from writing the issue URL to stdout.
pub fn run(client: &Client, args: Args) -> Result<()> {
    let body = body::resolve_required(
        args.body.as_deref(),
        args.body_file.as_deref(),
        "issue-create",
    )?;
    let (owner, name) = client.owner_repo()?;
    let label_ids = if args.labels.is_empty() {
        None
    } else {
        let all = labels::repo_labels(client)?;
        Some(labels::resolve_ids(&all, &args.labels)?)
    };
    let payload = CreateIssueOption {
        assignee: None,
        assignees: args.assignee.map(|a| vec![a]),
        body: Some(body),
        closed: None,
        due_date: None,
        labels: label_ids,
        milestone: None,
        r#ref: None,
        title: args.title,
    };
    let issue = client
        .api()
        .issue_create_issue(owner, name, payload)
        .send()?;
    if let Some(url) = issue.html_url {
        println!("{url}");
    }
    Ok(())
}